| 41 |
}; |
}; |
| 42 |
#endif // #ifdef _SEM_SEMUN_UNDEFINED |
#endif // #ifdef _SEM_SEMUN_UNDEFINED |
| 43 |
|
|
| 44 |
|
#define SECTION_TRY_LOCK_WAIT_TIME 1 // second |
| 45 |
|
#define SECTION_TRY_LOCK_TIMES 10 |
| 46 |
|
|
| 47 |
#define ARTICLE_BLOCK_PER_SHM 400 // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate |
#define ARTICLE_BLOCK_PER_SHM 400 // sizeof(ARTICLE_BLOCK) * ARTICLE_BLOCK_PER_SHM is the size of each shm segment to allocate |
| 48 |
#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 200 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
#define ARTICLE_BLOCK_SHM_COUNT_LIMIT 200 // limited by length (8-bit) of proj_id in ftok(path, proj_id) |
| 49 |
#define ARTICLE_BLOCK_PER_POOL (ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT) |
#define ARTICLE_BLOCK_PER_POOL (ARTICLE_BLOCK_PER_SHM * ARTICLE_BLOCK_SHM_COUNT_LIMIT) |
| 55 |
struct article_block_t |
struct article_block_t |
| 56 |
{ |
{ |
| 57 |
ARTICLE articles[ARTICLE_PER_BLOCK]; |
ARTICLE articles[ARTICLE_PER_BLOCK]; |
| 58 |
int32_t article_count; |
int article_count; |
| 59 |
struct article_block_t *p_next_block; |
struct article_block_t *p_next_block; |
| 60 |
}; |
}; |
| 61 |
typedef struct article_block_t ARTICLE_BLOCK; |
typedef struct article_block_t ARTICLE_BLOCK; |
| 62 |
|
|
|
struct article_block_shm_t |
|
|
{ |
|
|
int shmid; |
|
|
void *p_shm; |
|
|
}; |
|
|
typedef struct article_block_shm_t ARTICLE_BLOCK_SHM; |
|
|
|
|
| 63 |
struct article_block_pool_t |
struct article_block_pool_t |
| 64 |
{ |
{ |
| 65 |
ARTICLE_BLOCK_SHM shm_pool[ARTICLE_BLOCK_SHM_COUNT_LIMIT]; |
int shmid; |
| 66 |
|
struct |
| 67 |
|
{ |
| 68 |
|
int shmid; |
| 69 |
|
void *p_shm; |
| 70 |
|
} shm_pool[ARTICLE_BLOCK_SHM_COUNT_LIMIT]; |
| 71 |
int shm_count; |
int shm_count; |
| 72 |
ARTICLE_BLOCK *p_block_free_list; |
ARTICLE_BLOCK *p_block_free_list; |
| 73 |
ARTICLE_BLOCK *p_block[ARTICLE_BLOCK_PER_POOL]; |
ARTICLE_BLOCK *p_block[ARTICLE_BLOCK_PER_POOL]; |
| 74 |
int32_t block_count; |
int block_count; |
| 75 |
}; |
}; |
| 76 |
typedef struct article_block_pool_t ARTICLE_BLOCK_POOL; |
typedef struct article_block_pool_t ARTICLE_BLOCK_POOL; |
| 77 |
|
|
|
static int article_block_pool_shmid; |
|
| 78 |
static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
static ARTICLE_BLOCK_POOL *p_article_block_pool = NULL; |
| 79 |
|
|
| 80 |
static int section_list_pool_semid; |
struct section_list_pool_t |
| 81 |
static int section_list_pool_shmid; |
{ |
| 82 |
static SECTION_LIST *p_section_list_pool = NULL; |
int shmid; |
| 83 |
|
SECTION_LIST sections[BBS_max_section]; |
| 84 |
static int section_list_count = 0; |
int section_count; |
| 85 |
static TRIE_NODE *p_trie_dict_section_by_name = NULL; |
int semid; |
| 86 |
static TRIE_NODE *p_trie_dict_section_by_sid = NULL; |
TRIE_NODE *p_trie_dict_section_by_name; |
| 87 |
|
TRIE_NODE *p_trie_dict_section_by_sid; |
| 88 |
|
}; |
| 89 |
|
typedef struct section_list_pool_t SECTION_LIST_POOL; |
| 90 |
|
|
| 91 |
|
static SECTION_LIST_POOL *p_section_list_pool = NULL; |
| 92 |
|
|
| 93 |
int article_block_init(const char *filename, int block_count) |
int article_block_init(const char *filename, int block_count) |
| 94 |
{ |
{ |
| 137 |
return -3; |
return -3; |
| 138 |
} |
} |
| 139 |
|
|
|
article_block_pool_shmid = shmid; |
|
| 140 |
p_article_block_pool = p_shm; |
p_article_block_pool = p_shm; |
| 141 |
|
p_article_block_pool->shmid = shmid; |
| 142 |
|
|
| 143 |
p_article_block_pool->shm_count = 0; |
p_article_block_pool->shm_count = 0; |
| 144 |
pp_block_next = &(p_article_block_pool->p_block_free_list); |
pp_block_next = &(p_article_block_pool->p_block_free_list); |
| 201 |
|
|
| 202 |
void article_block_cleanup(void) |
void article_block_cleanup(void) |
| 203 |
{ |
{ |
| 204 |
|
int shmid; |
| 205 |
|
|
| 206 |
if (p_article_block_pool == NULL) |
if (p_article_block_pool == NULL) |
| 207 |
{ |
{ |
| 208 |
return; |
return; |
| 221 |
} |
} |
| 222 |
} |
} |
| 223 |
|
|
| 224 |
|
shmid = p_article_block_pool->shmid; |
| 225 |
|
|
| 226 |
if (shmdt(p_article_block_pool) == -1) |
if (shmdt(p_article_block_pool) == -1) |
| 227 |
{ |
{ |
| 228 |
log_error("shmdt(shmid = %d) error (%d)\n", article_block_pool_shmid, errno); |
log_error("shmdt(shmid = %d) error (%d)\n", shmid, errno); |
| 229 |
} |
} |
| 230 |
|
|
| 231 |
if (shmctl(article_block_pool_shmid, IPC_RMID, NULL) == -1) |
if (shmctl(shmid, IPC_RMID, NULL) == -1) |
| 232 |
{ |
{ |
| 233 |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", article_block_pool_shmid, errno); |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", shmid, errno); |
| 234 |
} |
} |
| 235 |
|
|
| 236 |
p_article_block_pool = NULL; |
p_article_block_pool = NULL; |
| 381 |
union semun arg; |
union semun arg; |
| 382 |
int i; |
int i; |
| 383 |
|
|
| 384 |
if (p_section_list_pool == NULL || p_trie_dict_section_by_name == NULL || p_trie_dict_section_by_sid == NULL) |
if (p_section_list_pool != NULL) |
| 385 |
{ |
{ |
| 386 |
section_list_cleanup(); |
section_list_cleanup(); |
| 387 |
} |
} |
| 394 |
return -3; |
return -3; |
| 395 |
} |
} |
| 396 |
|
|
| 397 |
|
// Allocate shared memory |
| 398 |
|
size = sizeof(SECTION_LIST_POOL); |
| 399 |
|
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
| 400 |
|
if (shmid == -1) |
| 401 |
|
{ |
| 402 |
|
log_error("shmget(section_list_pool_shm, size = %d) error (%d)\n", size, errno); |
| 403 |
|
return -3; |
| 404 |
|
} |
| 405 |
|
p_shm = shmat(shmid, NULL, 0); |
| 406 |
|
if (p_shm == (void *)-1) |
| 407 |
|
{ |
| 408 |
|
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
| 409 |
|
return -3; |
| 410 |
|
} |
| 411 |
|
|
| 412 |
|
p_section_list_pool = p_shm; |
| 413 |
|
p_section_list_pool->shmid = shmid; |
| 414 |
|
p_section_list_pool->section_count = 0; |
| 415 |
|
|
| 416 |
|
// Allocate semaphore as section locks |
| 417 |
size = 2 * (BBS_max_section + 1); // r_sem and w_sem per section, the last pair for all sections |
size = 2 * (BBS_max_section + 1); // r_sem and w_sem per section, the last pair for all sections |
| 418 |
semid = semget(key, (int)size, IPC_CREAT | IPC_EXCL | 0600); |
semid = semget(key, (int)size, IPC_CREAT | IPC_EXCL | 0600); |
| 419 |
if (semid == -1) |
if (semid == -1) |
| 433 |
} |
} |
| 434 |
} |
} |
| 435 |
|
|
| 436 |
section_list_pool_semid = semid; |
p_section_list_pool->semid = semid; |
| 437 |
|
|
| 438 |
size = sizeof(SECTION_LIST) * BBS_max_section; |
p_section_list_pool->p_trie_dict_section_by_name = trie_dict_create(); |
| 439 |
shmid = shmget(key, size, IPC_CREAT | IPC_EXCL | 0600); |
if (p_section_list_pool->p_trie_dict_section_by_name == NULL) |
|
if (shmid == -1) |
|
|
{ |
|
|
log_error("shmget(section_list_pool_shm, size = %d) error (%d)\n", size, errno); |
|
|
return -3; |
|
|
} |
|
|
p_shm = shmat(shmid, NULL, 0); |
|
|
if (p_shm == (void *)-1) |
|
|
{ |
|
|
log_error("shmat(shmid = %d) error (%d)\n", shmid, errno); |
|
|
return -3; |
|
|
} |
|
|
|
|
|
section_list_pool_shmid = shmid; |
|
|
p_section_list_pool = p_shm; |
|
|
section_list_count = 0; |
|
|
|
|
|
p_trie_dict_section_by_name = trie_dict_create(); |
|
|
if (p_trie_dict_section_by_name == NULL) |
|
| 440 |
{ |
{ |
| 441 |
log_error("trie_dict_create() OOM\n", BBS_max_section); |
log_error("trie_dict_create() OOM\n", BBS_max_section); |
| 442 |
return -2; |
return -2; |
| 443 |
} |
} |
| 444 |
|
|
| 445 |
p_trie_dict_section_by_sid = trie_dict_create(); |
p_section_list_pool->p_trie_dict_section_by_sid = trie_dict_create(); |
| 446 |
if (p_trie_dict_section_by_sid == NULL) |
if (p_section_list_pool->p_trie_dict_section_by_sid == NULL) |
| 447 |
{ |
{ |
| 448 |
log_error("trie_dict_create() OOM\n", BBS_max_section); |
log_error("trie_dict_create() OOM\n", BBS_max_section); |
| 449 |
return -2; |
return -2; |
| 471 |
SECTION_LIST *p_section; |
SECTION_LIST *p_section; |
| 472 |
char sid_str[SID_STR_LEN]; |
char sid_str[SID_STR_LEN]; |
| 473 |
|
|
| 474 |
if (p_section_list_pool == NULL || p_trie_dict_section_by_name == NULL || p_trie_dict_section_by_sid == NULL) |
if (p_section_list_pool == NULL) |
| 475 |
{ |
{ |
| 476 |
log_error("session_list_pool not initialized\n"); |
log_error("session_list_pool not initialized\n"); |
| 477 |
return NULL; |
return NULL; |
| 478 |
} |
} |
| 479 |
|
|
| 480 |
if (section_list_count >= BBS_max_section) |
if (p_section_list_pool->section_count >= BBS_max_section) |
| 481 |
{ |
{ |
| 482 |
log_error("section_list_count exceed limit %d >= %d\n", section_list_count, BBS_max_section); |
log_error("section_count reach limit %d >= %d\n", p_section_list_pool->section_count, BBS_max_section); |
| 483 |
return NULL; |
return NULL; |
| 484 |
} |
} |
| 485 |
|
|
| 486 |
sid_to_str(sid, sid_str); |
sid_to_str(sid, sid_str); |
| 487 |
|
|
| 488 |
p_section = p_section_list_pool + section_list_count; |
p_section = p_section_list_pool->sections + p_section_list_pool->section_count; |
| 489 |
|
|
| 490 |
p_section->sid = sid; |
p_section->sid = sid; |
| 491 |
|
|
| 498 |
strncpy(p_section->master_name, master_name, sizeof(p_section->master_name - 1)); |
strncpy(p_section->master_name, master_name, sizeof(p_section->master_name - 1)); |
| 499 |
p_section->master_name[sizeof(p_section->master_name - 1)] = '\0'; |
p_section->master_name[sizeof(p_section->master_name - 1)] = '\0'; |
| 500 |
|
|
| 501 |
if (trie_dict_set(p_trie_dict_section_by_name, sname, section_list_count) != 1) |
if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_name, sname, p_section_list_pool->section_count) != 1) |
| 502 |
{ |
{ |
| 503 |
log_error("trie_dict_set(section, %s, %d) error\n", sname, section_list_count); |
log_error("trie_dict_set(section, %s, %d) error\n", sname, p_section_list_pool->section_count); |
| 504 |
return NULL; |
return NULL; |
| 505 |
} |
} |
| 506 |
|
|
| 507 |
if (trie_dict_set(p_trie_dict_section_by_sid, sid_str, section_list_count) != 1) |
if (trie_dict_set(p_section_list_pool->p_trie_dict_section_by_sid, sid_str, p_section_list_pool->section_count) != 1) |
| 508 |
{ |
{ |
| 509 |
log_error("trie_dict_set(section, %d, %d) error\n", sid, section_list_count); |
log_error("trie_dict_set(section, %d, %d) error\n", sid, p_section_list_pool->section_count); |
| 510 |
return NULL; |
return NULL; |
| 511 |
} |
} |
| 512 |
|
|
| 513 |
section_list_reset_articles(p_section); |
section_list_reset_articles(p_section); |
| 514 |
|
|
| 515 |
section_list_count++; |
p_section_list_pool->section_count++; |
| 516 |
|
|
| 517 |
return p_section; |
return p_section; |
| 518 |
} |
} |
| 532 |
|
|
| 533 |
void section_list_cleanup(void) |
void section_list_cleanup(void) |
| 534 |
{ |
{ |
| 535 |
if (p_trie_dict_section_by_name != NULL) |
int shmid; |
| 536 |
|
|
| 537 |
|
if (p_section_list_pool == NULL) |
| 538 |
|
{ |
| 539 |
|
return; |
| 540 |
|
} |
| 541 |
|
|
| 542 |
|
if (p_section_list_pool->p_trie_dict_section_by_name != NULL) |
| 543 |
{ |
{ |
| 544 |
trie_dict_destroy(p_trie_dict_section_by_name); |
trie_dict_destroy(p_section_list_pool->p_trie_dict_section_by_name); |
| 545 |
p_trie_dict_section_by_name = NULL; |
p_section_list_pool->p_trie_dict_section_by_name = NULL; |
| 546 |
} |
} |
| 547 |
|
|
| 548 |
if (p_trie_dict_section_by_sid != NULL) |
if (p_section_list_pool->p_trie_dict_section_by_sid != NULL) |
| 549 |
{ |
{ |
| 550 |
trie_dict_destroy(p_trie_dict_section_by_sid); |
trie_dict_destroy(p_section_list_pool->p_trie_dict_section_by_sid); |
| 551 |
p_trie_dict_section_by_sid = NULL; |
p_section_list_pool->p_trie_dict_section_by_sid = NULL; |
| 552 |
} |
} |
| 553 |
|
|
| 554 |
if (p_section_list_pool != NULL) |
if (p_section_list_pool != NULL) |
| 555 |
{ |
{ |
| 556 |
if (shmdt(p_section_list_pool) == -1) |
if (semctl(p_section_list_pool->semid, 0, IPC_RMID) == -1) |
| 557 |
{ |
{ |
| 558 |
log_error("shmdt(shmid = %d) error (%d)\n", section_list_pool_shmid, errno); |
log_error("semctl(semid = %d, IPC_RMID) error (%d)\n", p_section_list_pool->semid, errno); |
| 559 |
} |
} |
|
p_section_list_pool = NULL; |
|
| 560 |
|
|
| 561 |
if (shmctl(section_list_pool_shmid, IPC_RMID, NULL) == -1) |
shmid = p_section_list_pool->shmid; |
| 562 |
|
|
| 563 |
|
if (shmdt(p_section_list_pool) == -1) |
| 564 |
{ |
{ |
| 565 |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", section_list_pool_shmid, errno); |
log_error("shmdt(shmid = %d) error (%d)\n", shmid, errno); |
| 566 |
} |
} |
| 567 |
|
|
| 568 |
if (semctl(section_list_pool_semid, 0, IPC_RMID) == -1) |
if (shmctl(shmid, IPC_RMID, NULL) == -1) |
| 569 |
{ |
{ |
| 570 |
log_error("semctl(semid = %d, IPC_RMID) error (%d)\n", section_list_pool_semid, errno); |
log_error("shmctl(shmid = %d, IPC_RMID) error (%d)\n", shmid, errno); |
| 571 |
} |
} |
|
} |
|
| 572 |
|
|
| 573 |
section_list_count = 0; |
p_section_list_pool = NULL; |
| 574 |
|
} |
| 575 |
} |
} |
| 576 |
|
|
| 577 |
SECTION_LIST *section_list_find_by_name(const char *sname) |
SECTION_LIST *section_list_find_by_name(const char *sname) |
| 578 |
{ |
{ |
| 579 |
int64_t index; |
int64_t index; |
| 580 |
|
int ret; |
| 581 |
|
|
| 582 |
if (p_section_list_pool == NULL || p_trie_dict_section_by_name == NULL) |
if (p_section_list_pool == NULL) |
| 583 |
{ |
{ |
| 584 |
log_error("section_list not initialized\n"); |
log_error("section_list not initialized\n"); |
| 585 |
return NULL; |
return NULL; |
| 586 |
} |
} |
| 587 |
|
|
| 588 |
if (trie_dict_get(p_trie_dict_section_by_name, sname, &index) != 1) |
ret = trie_dict_get(p_section_list_pool->p_trie_dict_section_by_name, sname, &index); |
| 589 |
|
if (ret < 0) |
| 590 |
{ |
{ |
| 591 |
log_error("trie_dict_get(section, %s) error\n", sname); |
log_error("trie_dict_get(section, %s) error\n", sname); |
| 592 |
return NULL; |
return NULL; |
| 593 |
} |
} |
| 594 |
|
else if (ret == 0) |
| 595 |
|
{ |
| 596 |
|
return NULL; |
| 597 |
|
} |
| 598 |
|
|
| 599 |
return (p_section_list_pool + index); |
return (p_section_list_pool->sections + index); |
| 600 |
} |
} |
| 601 |
|
|
| 602 |
SECTION_LIST *section_list_find_by_sid(int32_t sid) |
SECTION_LIST *section_list_find_by_sid(int32_t sid) |
| 603 |
{ |
{ |
| 604 |
int64_t index; |
int64_t index; |
| 605 |
|
int ret; |
| 606 |
char sid_str[SID_STR_LEN]; |
char sid_str[SID_STR_LEN]; |
| 607 |
|
|
| 608 |
if (p_section_list_pool == NULL || p_trie_dict_section_by_sid == NULL) |
if (p_section_list_pool == NULL) |
| 609 |
{ |
{ |
| 610 |
log_error("section_list not initialized\n"); |
log_error("section_list not initialized\n"); |
| 611 |
return NULL; |
return NULL; |
| 613 |
|
|
| 614 |
sid_to_str(sid, sid_str); |
sid_to_str(sid, sid_str); |
| 615 |
|
|
| 616 |
if (trie_dict_get(p_trie_dict_section_by_sid, sid_str, &index) != 1) |
ret = trie_dict_get(p_section_list_pool->p_trie_dict_section_by_sid, sid_str, &index); |
| 617 |
|
if (ret < 0) |
| 618 |
{ |
{ |
| 619 |
log_error("trie_dict_get(section, %d) error\n", sid); |
log_error("trie_dict_get(section, %d) error\n", sid); |
| 620 |
return NULL; |
return NULL; |
| 621 |
} |
} |
| 622 |
|
else if (ret == 0) |
| 623 |
|
{ |
| 624 |
|
return NULL; |
| 625 |
|
} |
| 626 |
|
|
| 627 |
return (p_section_list_pool + index); |
return (p_section_list_pool->sections + index); |
| 628 |
} |
} |
| 629 |
|
|
| 630 |
int section_list_append_article(SECTION_LIST *p_section, const ARTICLE *p_article_src) |
int section_list_append_article(SECTION_LIST *p_section, const ARTICLE *p_article_src) |
| 1105 |
move_article_count = article_count_of_topic(aid); |
move_article_count = article_count_of_topic(aid); |
| 1106 |
if (move_article_count <= 0) |
if (move_article_count <= 0) |
| 1107 |
{ |
{ |
| 1108 |
log_error("section_list_count_of_topic_articles(aid = %d) <= 0\n", aid); |
log_error("article_count_of_topic(aid = %d) <= 0\n", aid); |
| 1109 |
return -2; |
return -2; |
| 1110 |
} |
} |
| 1111 |
|
|
| 1271 |
} |
} |
| 1272 |
else |
else |
| 1273 |
{ |
{ |
| 1274 |
index = (int)(p_section - p_section_list_pool); |
index = (int)(p_section - p_section_list_pool->sections); |
| 1275 |
if (index < 0 || index >= BBS_max_section) |
if (index < 0 || index >= BBS_max_section) |
| 1276 |
{ |
{ |
| 1277 |
log_error("get_section_index(%d) error: index out of range\n", index); |
log_error("get_section_index(%d) error: index out of range\n", index); |
| 1306 |
// Read lock on any specific section will also acquire single read lock on "all section" |
// Read lock on any specific section will also acquire single read lock on "all section" |
| 1307 |
// so that write lock on all section only need to acquire single write on on "all section" |
// so that write lock on all section only need to acquire single write on on "all section" |
| 1308 |
// rather than to acquire multiple write locks on all the available sections. |
// rather than to acquire multiple write locks on all the available sections. |
| 1309 |
if (index == BBS_max_section) |
if (index != BBS_max_section) |
| 1310 |
{ |
{ |
| 1311 |
sops[2].sem_num = BBS_max_section * 2 + 1; // w_sem of all section |
sops[2].sem_num = BBS_max_section * 2 + 1; // w_sem of all section |
| 1312 |
sops[2].sem_op = 0; // wait until unlocked |
sops[2].sem_op = 0; // wait until unlocked |
| 1320 |
timeout.tv_sec = wait_sec; |
timeout.tv_sec = wait_sec; |
| 1321 |
timeout.tv_nsec = 0; |
timeout.tv_nsec = 0; |
| 1322 |
|
|
| 1323 |
ret = semtimedop(section_list_pool_semid, sops, (index == BBS_max_section ? 4 : 2), &timeout); |
ret = semtimedop(p_section_list_pool->semid, sops, (index == BBS_max_section ? 2 : 4), &timeout); |
| 1324 |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1325 |
{ |
{ |
| 1326 |
log_error("semtimedop(index = %d, lock read) error %d\n", index, errno); |
log_error("semtimedop(index = %d, lock read) error %d\n", index, errno); |
| 1357 |
timeout.tv_sec = wait_sec; |
timeout.tv_sec = wait_sec; |
| 1358 |
timeout.tv_nsec = 0; |
timeout.tv_nsec = 0; |
| 1359 |
|
|
| 1360 |
ret = semtimedop(section_list_pool_semid, sops, 3, &timeout); |
ret = semtimedop(p_section_list_pool->semid, sops, 3, &timeout); |
| 1361 |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1362 |
{ |
{ |
| 1363 |
log_error("semtimedop(index = %d, lock write) error %d\n", index, errno); |
log_error("semtimedop(index = %d, lock write) error %d\n", index, errno); |
| 1382 |
sops[0].sem_op = -1; // unlock |
sops[0].sem_op = -1; // unlock |
| 1383 |
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
| 1384 |
|
|
| 1385 |
// The same reason as section_list_try_rd_lock() |
if (index != BBS_max_section) |
|
if (index == BBS_max_section) |
|
| 1386 |
{ |
{ |
| 1387 |
sops[1].sem_num = BBS_max_section * 2; // r_sem of all section |
sops[1].sem_num = BBS_max_section * 2; // r_sem of all section |
| 1388 |
sops[1].sem_op = -1; // unlock |
sops[1].sem_op = -1; // unlock |
| 1389 |
sops[1].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
sops[1].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
| 1390 |
} |
} |
| 1391 |
|
|
| 1392 |
ret = semop(section_list_pool_semid, sops, (index == BBS_max_section ? 2 : 1)); |
ret = semop(p_section_list_pool->semid, sops, (index == BBS_max_section ? 1 : 2)); |
| 1393 |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1394 |
{ |
{ |
| 1395 |
log_error("semop(index = %d, unlock read) error %d\n", index, errno); |
log_error("semop(index = %d, unlock read) error %d\n", index, errno); |
| 1414 |
sops[0].sem_op = -1; // unlock |
sops[0].sem_op = -1; // unlock |
| 1415 |
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
sops[0].sem_flg = IPC_NOWAIT | SEM_UNDO; // no wait |
| 1416 |
|
|
| 1417 |
ret = semop(section_list_pool_semid, sops, 1); |
ret = semop(p_section_list_pool->semid, sops, 1); |
| 1418 |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
if (ret == -1 && errno != EAGAIN && errno != EINTR) |
| 1419 |
{ |
{ |
| 1420 |
log_error("semop(index = %d, unlock write) error %d\n", index, errno); |
log_error("semop(index = %d, unlock write) error %d\n", index, errno); |
| 1421 |
} |
} |
| 1422 |
|
|
| 1423 |
return ret; |
return ret; |
| 1424 |
|
} |
| 1425 |
|
|
| 1426 |
|
int section_list_rd_lock(SECTION_LIST *p_section) |
| 1427 |
|
{ |
| 1428 |
|
int timer = 0; |
| 1429 |
|
int sid = (p_section == NULL ? 0 : p_section->sid); |
| 1430 |
|
int ret = -1; |
| 1431 |
|
|
| 1432 |
|
while (!SYS_server_exit) |
| 1433 |
|
{ |
| 1434 |
|
ret = section_list_try_rd_lock(p_section, SECTION_TRY_LOCK_WAIT_TIME); |
| 1435 |
|
if (ret == 0) // success |
| 1436 |
|
{ |
| 1437 |
|
break; |
| 1438 |
|
} |
| 1439 |
|
else if (errno == EAGAIN || errno == EINTR) // retry |
| 1440 |
|
{ |
| 1441 |
|
timer++; |
| 1442 |
|
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
| 1443 |
|
{ |
| 1444 |
|
log_error("section_list_rd_lock() tried %d times on section %d\n", sid, timer); |
| 1445 |
|
} |
| 1446 |
|
} |
| 1447 |
|
else // failed |
| 1448 |
|
{ |
| 1449 |
|
log_error("section_list_rd_lock() failed on section %d\n", sid); |
| 1450 |
|
break; |
| 1451 |
|
} |
| 1452 |
|
} |
| 1453 |
|
|
| 1454 |
|
return ret; |
| 1455 |
|
} |
| 1456 |
|
|
| 1457 |
|
int section_list_rw_lock(SECTION_LIST *p_section) |
| 1458 |
|
{ |
| 1459 |
|
int timer = 0; |
| 1460 |
|
int sid = (p_section == NULL ? 0 : p_section->sid); |
| 1461 |
|
int ret = -1; |
| 1462 |
|
|
| 1463 |
|
while (!SYS_server_exit) |
| 1464 |
|
{ |
| 1465 |
|
ret = section_list_try_rw_lock(p_section, SECTION_TRY_LOCK_WAIT_TIME); |
| 1466 |
|
if (ret == 0) // success |
| 1467 |
|
{ |
| 1468 |
|
break; |
| 1469 |
|
} |
| 1470 |
|
else if (errno == EAGAIN || errno == EINTR) // retry |
| 1471 |
|
{ |
| 1472 |
|
timer++; |
| 1473 |
|
if (timer % SECTION_TRY_LOCK_TIMES == 0) |
| 1474 |
|
{ |
| 1475 |
|
log_error("acquire_section_rw_lock() tried %d times on section %d\n", sid, timer); |
| 1476 |
|
} |
| 1477 |
|
} |
| 1478 |
|
else // failed |
| 1479 |
|
{ |
| 1480 |
|
log_error("acquire_section_rw_lock() failed on section %d\n", sid); |
| 1481 |
|
break; |
| 1482 |
|
} |
| 1483 |
|
} |
| 1484 |
|
|
| 1485 |
|
return ret; |
| 1486 |
} |
} |